Added unit test for Gibbs sampler of normal model with unknown mean and variance.
Merge branch 'acbecker' into kelly-dev
Updated Xcode project settings to reflect refactoring of file structure.
Xcode project file changes
Added comment about using iterators in Parameter::AddToSample
Minor cosmetic changes
Merge branch 'kelly-dev' into acbecker

Conflicts:
	yamcmc++.xcodeproj/project.pbxproj
	yamcmc++/yamcmcpp/__init__.py
Added location of python headers to Xcode search paths
Xcode changes
Merge branch 'kelly-dev' into acbecker